WO2012162478A3 - Environmental corrections in nuclear spectroscopy using variable shape standard - Google Patents

Environmental corrections in nuclear spectroscopy using variable shape standard Download PDF

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Publication number
WO2012162478A3
WO2012162478A3 PCT/US2012/039304 US2012039304W WO2012162478A3 WO 2012162478 A3 WO2012162478 A3 WO 2012162478A3 US 2012039304 W US2012039304 W US 2012039304W WO 2012162478 A3 WO2012162478 A3 WO 2012162478A3
Authority
WO
WIPO (PCT)
Prior art keywords
nuclear spectroscopy
neutrons
gamma
gamma rays
tool
Prior art date
Application number
PCT/US2012/039304
Other languages
French (fr)
Other versions
WO2012162478A2 (en
Inventor
Jim A. Grau
Jeffrey MILES
Markus Berheide
Original Assignee
Schlumberger Canada Limited
Services Petroliers Schlumberger
Schlumberger Holdings Limited
Schlumberger Technology B.V.
Prad Research And Development Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schlumberger Canada Limited, Services Petroliers Schlumberger, Schlumberger Holdings Limited, Schlumberger Technology B.V., Prad Research And Development Limited filed Critical Schlumberger Canada Limited
Priority to EP12725248.4A priority Critical patent/EP2715408A2/en
Priority to BR112013030121A priority patent/BR112013030121A2/en
Priority to CN201280036587.0A priority patent/CN103797383A/en
Priority to MX2013013620A priority patent/MX336089B/en
Priority to US14/118,876 priority patent/US20140138530A1/en
Publication of WO2012162478A2 publication Critical patent/WO2012162478A2/en
Publication of WO2012162478A3 publication Critical patent/WO2012162478A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity
    • G01V5/04—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
    • G01V5/08—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays
    • G01V5/10—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources
    • G01V5/101—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources and detecting the secondary Y-rays produced in the surrounding layers of the bore hole

Abstract

An aspect of a formation may be estimated by placing a nuclear spectroscopy tool including a neutron source and a gamma ray detector into a borehole and performing a plurality of environmental measurements. Neutrons are emitted from the nuclear spectroscopy tool such that some of the neutrons generate gamma rays from a formation adjacent the nuclear spectroscopy tool, some of the neutrons generate gamma rays from elements within the nuclear spectroscopy tool and some of the neutrons generate gamma rays from an element in the drilling mud. An energy spectrum of gamma rays induced by the emitted neutrons can be detected with the tool. The detected gamma-ray energy spectrum can be analyzed using a combination of standard spectra, where the shape of at least one of the standard spectra can be varied based on the environmental measurements to account for the environment's effects on gamma-ray spectra.
PCT/US2012/039304 2011-05-24 2012-05-24 Environmental corrections in nuclear spectroscopy using variable shape standard WO2012162478A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP12725248.4A EP2715408A2 (en) 2011-05-24 2012-05-24 Environmental corrections in nuclear spectroscopy using variable shape standard
BR112013030121A BR112013030121A2 (en) 2011-05-24 2012-05-24 method for estimating an aspect of a formation using a nuclear spectroscopy tool, nuclar spectroscopy tool for estimating an aspect of a formation, and system for estimating an aspect of a formation
CN201280036587.0A CN103797383A (en) 2011-05-24 2012-05-24 Environmental corrections in nuclear spectroscopy using variable shape standard
MX2013013620A MX336089B (en) 2011-05-24 2012-05-24 Environmental corrections in nuclear spectroscopy using variable shape standard.
US14/118,876 US20140138530A1 (en) 2011-05-24 2012-05-24 Environmental Corrections in Nuclear Spectroscopy Using Variable Shape Standard

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161489295P 2011-05-24 2011-05-24
US61/489,295 2011-05-24

Publications (2)

Publication Number Publication Date
WO2012162478A2 WO2012162478A2 (en) 2012-11-29
WO2012162478A3 true WO2012162478A3 (en) 2013-03-28

Family

ID=46201859

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/039304 WO2012162478A2 (en) 2011-05-24 2012-05-24 Environmental corrections in nuclear spectroscopy using variable shape standard

Country Status (6)

Country Link
US (1) US20140138530A1 (en)
EP (1) EP2715408A2 (en)
CN (1) CN103797383A (en)
BR (1) BR112013030121A2 (en)
MX (1) MX336089B (en)
WO (1) WO2012162478A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9069095B1 (en) * 2013-12-16 2015-06-30 Schlumberger Technology Corporation Monitoring the output of a radiation generator
US9417355B2 (en) 2013-12-31 2016-08-16 Schlumberger Technology Corporation Composition-matched inelastic or capture spectroscopy tool
CN107075939A (en) * 2014-10-03 2017-08-18 哈里伯顿能源服务公司 The gain stabilization of natural gamma rays instrument
EP3194718A1 (en) * 2014-12-24 2017-07-26 Halliburton Energy Services, Inc. Near-bit gamma ray sensors in a rotating section of a rotary steerable system
US9835759B2 (en) 2015-11-30 2017-12-05 Schlumberger Technology Corporation Neutron-induced gamma-ray spectroscopy that accounts for environmental dependence of inelastic gamma-ray emission spectra
WO2018057035A1 (en) 2016-09-26 2018-03-29 Halliburton Energy Services, Inc. Neutron porosity log casing thickness corrections
CN110145301B (en) * 2019-04-28 2023-02-10 中国石油天然气集团有限公司 Method for correcting environment of logging tool by density imaging while drilling
CN110454147B (en) * 2019-07-31 2023-01-10 中国石油天然气集团有限公司 Controllable source integrated nuclear logging instrument and logging method
CN110439545B (en) * 2019-08-02 2023-04-25 中国石油天然气集团有限公司 Environment correction method for logging instrument with neutron porosity of controllable source while drilling
CN111610575A (en) * 2020-04-24 2020-09-01 中国石油天然气集团有限公司 Logging curve environment correction method, system and device
CN113669048A (en) * 2021-07-30 2021-11-19 长江大学 Method for extracting thermal neutron time attenuation logging macroscopic capture cross section value

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145814A (en) * 1983-08-22 1985-04-03 Schlumberger Ltd Investigating earth formation traversed by a borehole
US4661701A (en) * 1985-07-17 1987-04-28 Schlumberger Technology Corporation Methods and apparatus for borehole-corrected spectral analysis of earth formations
FR2790835A1 (en) * 1999-03-10 2000-09-15 Schlumberger Services Petrol Correcting data is obtained by a downhole tool during well logging for anomalies that may be caused by environmental characteristics and/or intrinsic downhole tool parameters

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6389367B1 (en) * 1999-03-10 2002-05-14 Schlumberger Technology Corporation Method and apparatus for calibrating readings of a downhole tool
US8642944B2 (en) * 2007-08-31 2014-02-04 Schlumberger Technology Corporation Downhole tools with solid-state neutron monitors

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145814A (en) * 1983-08-22 1985-04-03 Schlumberger Ltd Investigating earth formation traversed by a borehole
US4661701A (en) * 1985-07-17 1987-04-28 Schlumberger Technology Corporation Methods and apparatus for borehole-corrected spectral analysis of earth formations
FR2790835A1 (en) * 1999-03-10 2000-09-15 Schlumberger Services Petrol Correcting data is obtained by a downhole tool during well logging for anomalies that may be caused by environmental characteristics and/or intrinsic downhole tool parameters

Also Published As

Publication number Publication date
MX2013013620A (en) 2014-02-11
BR112013030121A2 (en) 2019-09-24
MX336089B (en) 2016-01-08
EP2715408A2 (en) 2014-04-09
CN103797383A (en) 2014-05-14
US20140138530A1 (en) 2014-05-22
WO2012162478A2 (en) 2012-11-29

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